"Dudu's Ghost" and the Dedication Orchestra at the 100 Club
- Authors: Alfred, Luke
- Date: 2012 , 1993
- Subjects: McGregor, Chris -- 1936-1990 , Blue Notes (Musical group : South Africa) , Pukwana, Dudu , Jazz , Jazz musicians , Dyani, Johnny Mbizo , Feza, Mongezi , Miller, Harry , Dedication Orchestra , 100 Club
- Language: English
- Type: Article
- Identifier: vital:13472 , http://hdl.handle.net/10962/d1001394 , McGregor, Chris -- 1936-1990 , Blue Notes (Musical group : South Africa) , Pukwana, Dudu , Jazz , Jazz musicians , Dyani, Johnny Mbizo , Feza, Mongezi , Miller, Harry
- Description: The Dedication Orchestra is a group of contemporary English and South African musicians formed in honour of the memory of the Blue Notes, the seminal South African jazz band who found a home from home in London during the early 60s. , Photocopied article from the newspaper SA Times about a concert by the Dedication Orchestra at the 100 Club, London, in honour of the memory of the Blue Notes. There are 5 pictures with the article. The left picture shows Dudu Pukwana playing soprano saxophone, the top middle photo shows Johnny Dyani playing double bass, Mongezi Feza is on the below photo, Chris McGregor is on the top right picture and on the below right photo there is Harry Miller.
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- Date Issued: 1993
Anniversary Bulletin: 50th year of struggle... and the sgtruggle continues
- Date: 1993
- Subjects: Government, Resistance to -- South Africa , South Africa -- History -- 20th century , South Africa -- Politics and government
- Language: English
- Type: text , Article
- Identifier: http://hdl.handle.net/10948/34038 , vital:33178 , Bulk File 7
- Description: This is the 50th Anniversary Bulletin of the Unity Movement.
- Full Text: false
- Date Issued: 1993
Ranking of topical corticosteroids: principles and results
- Authors: Smith, Eric W , Haigh, John M
- Date: 1993
- Language: English
- Type: text , Article
- Identifier: vital:6434 , http://hdl.handle.net/10962/d1006607
- Description: The increasing synthesis and use of topical corticosteroid products over the past 30 years has necessitated the development of suitable methods for evaluating the efficacy and potency of new drug entities. Several in vivo models have been developed in this regard using laboratory animals and human subjects. Generally, these tests measure the difference in the non-immunological inflammatory response to an exogenous inflammatory mediator in the presence and absence of the corticosteroid under test. There are also immunologically based assays and several tests which assess the anti proliferative effects of the drug. Several comparative disease model evaluations have also been developed using human subjects. Most of these assays are non-ideal from one point of view or another: most are invasive methods which require some form of trauma to be induced in the skin and therefore problematic to perform and monitor.
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- Date Issued: 1993
The interactive effects of light, temperature and CO[subscript 2]/O[subscript 2] ratios on photosynthesis in Coix lachryma-jobi L
- Authors: Mjwara, Jabulani M , Botha, Christiaan E J
- Date: 1993
- Language: English
- Type: Article
- Identifier: vital:6527 , http://hdl.handle.net/10962/d1005961
- Description: A portable infra-red gas analyzer was used to investigate the interactive effects of light, temperature, and CO[subscript 2]/O[subscript 2] ratios under controlled environmental conditions in an attempt to model gas exchange characteristics of Coix lachryma-jobi L. Plotting light response curves as a function of temperature (20, 25, 30 and 35 degrees C) revealed no sign of light saturation even at a photosynthetic photon flux density (PPFD) close to 2000 µmol m[superscript -2]s[superscript -1]. High net assimilation rates (A) of approximately 24 µmol CO[subscript 2] m[superscript -2]s[superscript -1] were realized at 30-35 degrees C. Assimilation (A) versus internal CO[subscript 2] partial pressure Ci curves showed a steep rise in A with increase in C[subscript i] but saturated at approximately 150 µl[superscript -1] and the effect was similar in either the absence or presence of O[subscript 2], under all temperature regimes. C. lachryma-jobi exhibited low CO[subscript 2] compensation points (Γ*) between 0 and 10 µl[superscript -1] at either 0 or 21% O[subscript 2]. The slopes of double reciprocal plots of 1/A versus 1/C[subscript i], were nearly identical and crossed the y-intercept at almost identical points under all O[subscript 2] concentrations. This data indicated that there was no apparent O[subscript 2] inhibition and that the apparent inhibitor constant (K[subscript i]) for O[subscript 2] at the site of carboxylation did not change with an increase in [O[subscript 2]] from 0 to 21%. These observations were further confirmed by results obtained from the analysis of apparent carboxylation efficiency where no inhibition of A with increase of [O[subscript 2]] occurred. These characteristics are thus consistent with typical features of C[subscript 4] photosynthesis.
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- Date Issued: 1993
The remains of rock glaciers in Bottelnek, East Cape Drakensberg, South Africa
- Authors: Lewis, Colin A , Hanvey, Patricia M
- Date: 1993
- Language: English
- Type: Article
- Identifier: vital:6698 , http://hdl.handle.net/10962/d1006734
- Description: Certain debris accumulations in Bottelnek are ascribed a rock glacier origin on the basis of morphological and sedimentological evidence. Radiocarbon dating indicates that rock glaciers were active at or subsequent to 21 000 BP and that cold, stadial conditions, existed on the region after 27 000 BP and before 13 000 BP, during the Bottelnek Stadial. At least sporadic permafrost existed in Bottelnek when the rock glaciers were active.
- Full Text: false
- Date Issued: 1993
The ultrastructure and computer-enhanced digital image analysis of plasmodesmata at the Kranz mesophyll-bundle sheath interface of Themeda triandra var. imberbis (Retz) A. Camus in conventionally-fixed leaf blades
- Authors: Botha, Christiaan E J , Hartley, B J , Cross, Robin H M
- Date: 1993
- Language: English
- Type: Article
- Identifier: vital:6502 , http://hdl.handle.net/10962/d1005925
- Description: The ultrastructure of the plasmodesmata at the Kranz mesophyll-bundle sheath (KMS-BS) interface in Themeda triandra, and the substructures within the plasmodesmata were investigated, using conventionally fixed leaf-blade material, enhanced by the addition of 0.1% tannic acid to the primary fixative. Examination of high-resolution electronmicrographs, and computer-enhanced digital images suggests that these plasmodesmata are complex structures, comprised of helically-arranged particulate material. The electron-dense particles are between 2.5 and 3.0nm in diameter. These particles are specifically associated with the inner face of the inner plasmalemma membrane leaflet, and the outer region of the desmotubule wall. The electron-dense particles are presumably proteinaceous and embedded in a lipid matrix. In the constricted median portion of the KMS-BS plasmodesmata, the space between the desmotubule and the inner plasmalemma membrane leaflet and areas surrounding the proteinaceous particles thereof (the cytoplasmic sleeve) is about 3nm in cross-section, and constitutes what we believe to be the space through which intercellular transport takes place.
- Full Text: false
- Date Issued: 1993
Winter absconding as a dispersal mechanism of the Cape honeybee
- Authors: Hepburn, H Randall , Villet, Martin H , Jones, G , Carter, A , Simon, V , Coetzer, W
- Date: 1993
- Language: English
- Type: Article
- Identifier: vital:6862 , http://hdl.handle.net/10962/d1011154
- Description: The dispersal characteristics of the African honeybee, Apis mellifera scutellata, resulted in a greatly mobile hybrid front in the New World, but in Africa its hybridization zone with the Cape honeybee, Apis mellifera capensis, appears very stable.The maintenance of stable hybrid zones is predicated on a balance between dispersal and selection Knowledge on the extent of gene flow from either race is in its infancy, and the probability of successful dispersal by either race has not yet been considered. Both capensis and scutellata are notorious for absconding, capensis the more so for resource-related seasonal absconding in winter. The two races also differ fundamentally in the ways they conserve heat both behaviourally and physiologically. We investigated the energy consumption and colony survival characteristics of capensis in terms of winter absconding in a climate with cycles of warm days interspersed with cold days. These are compared with calculated values for scutellata to assess whether capensis might have a directional gene flow advantage over scutellata in their zone of hybridization.
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- Date Issued: 1993